mktime help please

djones

mktime is confusing for me. Can someone please help me to convert 09:00:00 (HH:MM:SS), add 30 min to the time, 09:30:00, and convert to unix time 093000?

etully

I think you are confused about Unix time. Unix time is the number of seconds that have elapsed since Midnight December 31, 1969. Ten seconds after midnight, January 1, 1970, Unix time was 10. Twenty four hours later (ten seconds after midnight, January 2, 1970), Unix time was:
24 60 60 + 10
which was 86410.

mktime takes a day, month, hour, minute, second, and YEAR and converts it to Unix time. For example:

9:30 AM, July 4, 1997 was:
mktime(9, 30, 0, 7, 4, 1997);
which was: 868023000 seconds after midnight, December 31, 1969.

NogDog

Let's clarify the requirements.

UNIX time is a number of seconds since and arbitrary date/time. A clock time of 09:30:00 would not convert to a UNIX time of 093000, but to a number of seconds.

So when you say you want to convert 09:00:00 to 30 minutes later in UNIX time, what do you really want: 93600 + 3060 seconds, or the UNIX time for 09:30:00 of today's date (which will be a much larger integer than the above), or something else altogether?

djones

ok I am confused about the unix time. Take that out of the equation, sorry. I need to convert a time similar (will be different each time, pulling from a calendar D😎 to 09:00:00 and add 30 minutes and remove the colons. So 09:00:00 will be 093000.

NogDog

Untested:

$time = '09:00:00';
list($hr, $min, $sec) = explode(':', $time);
$plus30 = date('His', strototime('+30 minutes', mktime($hr, $min, $sec)));

djones

I was almost there, but I would have never figured out the strototime(). Thanks.

Installer

Or, slightly simpler:

$time = '09:00:00';
$plus30 = date('H:i:s', strtotime(date('Y-m-d '. $time) . ' +4 hours'));

In any case, be sure that any dst change is covered.